<template>
  <div class="lrbg">
    <div class="login-container">
      <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" auto-complete="on" label-position="left">
        <div class="title-container">
          <h3 class="title">在线测评系统</h3>
        </div>
        <el-form-item prop="email">
          <span class="svg-container">
            <svg-icon icon-class="user" />
          </span>
          <el-input
            ref="email"
            v-model="loginForm.email"
            placeholder="Email"
            name="email"
            type="text"
            tabindex="1"
            auto-complete="on"
          />
        </el-form-item>

        <el-form-item prop="password">
          <span class="svg-container">
            <svg-icon icon-class="password" />
          </span>
          <el-input
            :key="passwordType"
            ref="password"
            v-model="loginForm.password"
            :type="passwordType"
            placeholder="Password"
            name="password"
            tabindex="2"
            auto-complete="on"
            @keyup.enter.native="handleLogin"
          />
          <span class="show-pwd" @click="showPwd">
            <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
          </span>
        </el-form-item>

        <el-button :loading="loading" type="success" style="width:100%;margin-bottom:30px;" @click.native.prevent="handleLogin">登录</el-button>
        <router-link to="/register">
          <el-button type="primary" style="width:50%;border-radius: 4px 0 0 4px;">去注册</el-button>
        </router-link>
        <router-link to="/findPass">
          <el-button type="warning" style="width:50%;border-radius: 0 4px 4px 0;">找回密码?</el-button>
        </router-link>
      </el-form>
    </div>
  </div>
</template>

<script>
import { validEmail } from '@/utils/validate'
import { login } from '@/api/user'
import { Message } from 'element-ui'
import { setToken, setUserId, setRoleId, setAvatar, setEmail } from '@/utils/auth'

export default {
  data() {
    const validateEmail = (rule, value, callback) => {
      if (!validEmail(value)) {
        callback(new Error('请输入正确的邮箱'))
      } else {
        callback()
      }
    }
    const validatePassword = (rule, value, callback) => {
      if (value.length < 8) {
        callback(new Error('请输入不小于8位的密码'))
      } else {
        callback()
      }
    }
    return {
      loginForm: {
        email: '',
        password: ''
      },
      loginRules: {
        email: [{ required: true, trigger: 'blur', validator: validateEmail }],
        password: [{ required: true, trigger: 'blur', validator: validatePassword }]
      },
      loading: false,
      passwordType: 'password',
      redirect: undefined
    }
  },
  watch: {
    $route: {
      handler: function(route) {
        this.redirect = route.query && route.query.redirect
      },
      immediate: true
    }
  },
  methods: {
    showPwd() {
      if (this.passwordType === 'password') {
        this.passwordType = ''
      } else {
        this.passwordType = 'password'
      }
      this.$nextTick(() => {
        this.$refs.password.focus()
      })
    },
    handleLogin() {
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true
          const formData = new FormData()
          formData.append('email', this.loginForm.email)
          formData.append('password', this.loginForm.password)
          login(formData).then(res => {
            setToken(res.data.token, res.data.expiresIn)
            setUserId(res.data.userId, res.data.expiresIn)
            setAvatar(res.data.headPortrait, res.data.expiresIn)
            setRoleId(res.data.roleId, res.data.expiresIn)
            setEmail(res.data.email, res.data.expiresIn)
            Message.success(res.message)
            setTimeout(() => {
              if (this.$route.query.redirect === location.hostname) {
                this.$router.go(-1)
              } else {
                this.$router.push({ path: this.redirect || '/' })
              }
            }, 1500)
            this.loading = false
          }).catch(() => {
            this.loading = false
          })
        }
      })
    }
  }
}
</script>

<style lang="scss">

$bg:#283443;
$light_gray:#fff;
$cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}

.lrbg{
  background-size: cover;
  background-repeat: no-repeat;
  background-image: url('../../../icons/m.jpg');
}

/* reset element-ui css */
.login-container {

  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}
</style>

<style lang="scss" scoped>
$bg:#2d3a4b;
$dark_gray:#889aa4;
$light_gray:#eee;

.login-container {
  min-height: 100vh;
  height: 100%;
  width: 100%;
  overflow: hidden;

  background-color: rgba(#000, .6);

  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    margin: 0 auto;
    overflow: hidden;
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .title-container {
    position: relative;

    .title {
      font-size: 26px;
      color: $light_gray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }
}
</style>
